Car-seat lock



2 Sheets-Sheet 1.

(No Model.)

C. PARHAM.

GAR SEAT LOGK.

No. 372,430. Patented Nov. l, 1887.

NNW

Wzefs'ses:

z new?? N. PETERS. Phaxo-mhagnphur. washington. D. C.

(No Model.) 2 Sheets-Sheet 2.

C. PARHAM.

GAR SEAT LOOK. No. 372,430. Patented Nov. 1, 1887.

UNITED STATES ATsNT Fries.

CAR-SEAT Loci .SPECIFICATION forming part of Letters Patent No, 372,430,dated November l, 1887.

Application tiled July il?, ISST. Serial N n 245,492. (No model.)

To aZZ whom it may concern.-

Be it known that I, CHARLES PARHM, a citizen of the United States,residing in the city and county of Philadelphia, in the State ofPennsylvania, have invented an Improvement in Gar Seat Locks, of whichthe following is a specification.

My invention relates generally to such seats as are constructed withshifting or reversible backs, and particularly to the locking` device bywhich the car seat back and its arm are locked together in givenadjustments, as well as to means for the prevention of the picking ofthe lock by which the back arm is locked to the seat.

The object of my invention is to provide anautomaticlockingdevice,adjustablyconnected with the back, or with theback arm, and adapted, by gravity, to fall into a slot or stop on one ofsaid parts or members and to thus lock said parts together,-and itsfurther object is to provide a device by which the introduction of knifeblades and similar articles between the outer surface of the back armand the inner surface of the seat arm, will be rendered impossible,andthe shifting of the spring controlled lock bolt, by which said parts arelocked together, be prevented.

In the accompanying drawings Figure 1 is a side elevation of the end ofa car seat, ofthe back arm, and of the operative parts of the lock bywhich said back and back arm are locked together, the position of saidparts, when the back is shifted to the other side of the seat, beingshown in dotted lines. Fig. 2 is an end elevation, partly in sectionthrough the seat arm, the back arm and its bolt slots, and the seat armbracket, of part of the devices shown in Fig. l. Figs. 3, 4, 5, and 6,are detail views in perspective of the parts of the locking device shownin Fig. l.

Similar letters of reference indicate corresponding parts.

In the drawings A is the seat arm, B the back arm at one end pivotallyattached thereto, and, at the other end, by a hinged joint, connectedwith the back plate C. rIhe back plate C isv provided with a diskportion D part of the periphery of which has a wall E within which thering J, in which the arm B terminates, is housed 5 on this ring the backplate C,

by reason of the space between the ends of the wall E, may, through alimited path, be rocked.

The disk D is provided with projections F F and G G between which theends M and N respectively of a bolt L are adjustably contained. The ring.I is provided with slots or stops K K, each so located as that when thelower end of the wall E ofthe back plate C is revolved into contact withthe edge of the back arm B, the lower of said slots is in position topermit the lower end of the bolt L to drop into it. W'hen the back armis unlocked from the seat arm, and the back arm and back carried to theother side of the seat, and the back revolved to a new position of adjustrnent in respect to the seat, the bolt L, by gravity, drops, the endN thereofwithdrawing from the slot K and the end M falling into the slotK, the back and back arm being thereby locked together in their newpositions of adjustment.

O is a plate, at one side provided with a pin P adapted to take into ahole H in the disk D and provided with screw holes through which it may,byscrews taking into holesfg, be secured over thc parts of the lockingdevice.

I is a slot in the periphery of the ring J to permit of the passage ofthe pin P in the adjustment ofthe back and back arm in respect to eachother.

The back arm B is supported in the usual manner by taking into a bracketY attached to the inside of the car seat frame. It is locked to theearseat by a lock of usual construction consisting of a retractable boltV, controlled by a spring X, and adapted to be operated to be withdrawnfrom its seat, in the outer side ofthe back arm, by a key U.

In locks of this class, as heretofore constructed, it has been possibleto unlock the lock by inserting the blade of a knife, a sheet of metal,or a kindred article, between the face of the back arm in which the boltslot was located, and the face of the bracket. lying in contacttherewith, with the result that the knife blade, or sheet of metal,acting downwardly upon the beveled end ofthe lock bolt forced said boltout of its seat in the back arm, and thus permitted the back to bethrown to the other side of the seat. v

In my device I provide two bolt slots Q, R,

ICO

one to reccive the locking bolt when the back arm is at one side of theseat, and the'other to receive it when the back arm is at the other sideof the seat. These bolt slots are separated by a Wall or rib S whichprojects beyond the surface of the back arm, and which, when' the backarm-is in the bracket Y, is in place immediately over a shoulder Tformed upon the inner surface of said bracket at a point above the holetherein through which the bolt lock enters.

It is obvious that this construction prevents y the introduction of aknife blade, or similar and a locking device adjustably attached to oneof said members and adapted, by gravity, to drop into a slot or stop inthe other member and lock said members together, and, by gravity, whenthe back is shifted to the other side of said seat, to drop out of saidslot or -stop and permit the back to be adjusted at a newangle to theseat, and then, by gravity, to drop into a second slot and lock saidmembers together, as specified. f

3. In combination, a car seat back arm provided with two bolt slots anda rib or Wall Lwhich projects outwardly beyond the face of CHAS. PARHAM.

In presence of- J. BoNsALL TAYLOR, Il. NoRMANjDIXoN.

